compiler.defun is a plugin for the Smarty template Engine.
It started in this thread on the smarty-forum
compiler.defun provides the ability to define a block in the template and to reference this block from within itself (recursion)
An example:
TODOOutput:
TODOThe Sourcecode:
<?php
/* create code for a function call */
function smarty_compiler_fun($tag_args, &$compiler) {
$_attrs = $compiler->_parse_attrs($tag_args);
if (!isset($_attrs['name'])) $compiler->_syntax_error("fun: missing name parameter");
$_func_name = $compiler->_dequote($_attrs['name']);
$_func = 'smarty_fun_'.$_func_name;
$_params = 'array(';
$_sep = '';
unset($_attrs['name']);
foreach ($_attrs as $_key=>$_value) {
$_params .= "$_sep'$_key'=>$_value";
$_sep = ',';
}
$_params .= ')';
return "$_func(\$this, $_params); ";
}
$this->register_compiler_function('fun', 'smarty_compiler_fun');
/* create code for a function declaration */
function smarty_compiler_defun($tag_args, &$compiler) {
$attrs = $compiler->_parse_attrs($tag_args);
$func_key = '"' . md5('php-5') . '[[' . md5(uniqid('sucks')) . '";';
array_push($compiler->_tag_stack, array('defun', $attrs, $tag_args, $func_key));
if (!isset($attrs['name'])) $compiler->_syntax_error("defun: missing name parameter");
$func_name = $compiler->_dequote($attrs['name']);
$func = 'smarty_fun_'.$func_name;
return $func_key . "if (!function_exists('$func')) { function $func(&\$this, \$params) { \$_fun_tpl_vars = \$this->_tpl_vars; \$this->assign(\$params); ";
}
/* create code for closing a function definition and calling said function */
function smarty_compiler_defun_close($tag_args, &$compiler) {
list($name, $attrs, $open_tag_args, $func_key) = array_pop($compiler->_tag_stack);
if ($name!='defun') $compiler->_syntax_error("unexpected {/defun}");
return " \$this->_tpl_vars = \$_fun_tpl_vars; }} " . $func_key . smarty_compiler_fun($open_tag_args, $compiler);
}
$this->register_compiler_function('/defun', 'smarty_compiler_defun_close');
/* callback to replace all $this with $smarty */
function smarty_replace_fun($match) {
$tokens = token_get_all('<?php ' . $match[2]);
/* remove trailing <?php */
$open_tag = '';
while ($tokens) {
$token = array_shift($tokens);
if (is_array($token)) {
$open_tag .= $token[1];
} else {
$open_tag .= $token;
}
if ($open_tag == '<?php ') break;
}
/* replace */
for ($i=0, $count=count($tokens); $i<$count; $i++) {
if (is_array($tokens[$i])) {
if ($tokens[$i][0] == T_VARIABLE && $tokens[$i][1] == '$this') {
$tokens[$i] = '$smarty';
} else {
$tokens[$i] = $tokens[$i][1];
}
}
}
return implode('', $tokens);
}
/* postfilter to squeeze the code to make php5 happy */
function smarty_postfilter_defun($source, &$compiler) {
$search = '("' . md5('php-5') . '\[\[[0-9a-f]{32}";)';
if ((double)phpversion()>=5.0) {
/* filter sourcecode. look for func_keys and replace all $this
in-between with $smarty */
while (1) {
$new_source = preg_replace_callback('/' . $search . '(.*)\\1/Us', 'smarty_replace_fun', $source);
if (strcmp($new_source, $source)==0) break;
$source = $new_source;
}
} else {
/* remove func_keys */
$source = preg_replace('/' . $search . '/', '', $source);
}
return $source;
}
$this->register_postfilter('smarty_postfilter_defun');
?>
Or just download it.
To install the plugin just drop the file in one of your site's plugins-dirs.